Toshiba RAS-10YAV-E, RAS-13YKV-E, RAS-10YKV-E, RAS-13YAV-E service manual Check procedures Table

(3) Check procedures

Table 10-8-1

No.	Procedure	Check point (Symptom)								Causes
1	Shut off the power supply and	1. Is the fuse blown?							1. * Application of shock voltage.
	remove the P.C. board assembly								* Overload by short-circuit of the
	from the electronic parts base.									parts.
	Remove the connecting cable from
	the terminal block.
2	Remove the connector for the	Voltage check							1. * AC power cord is defective.
	motor, and turn the power on.	1. Between			and				* Poor contact of the terminal plate.
			TP1			TP2
	If the OPERATION lamp flashes	(220–230–240V AC)							* Miss wiring of the power relay.
	(0,5 sec. :ON, 0,5 sec. :OFF) when	2. Between			and pin 1 of CN04
				TP2					2. Fuse is defective.
	the power turning on, the checking	(220–230–240V AC)							3. Operation of the thermal fuse.
	points described as 1-5 of right
		3. Between		TP2	and pin 3 of CN04				4. * Capacitor (C01, C15) is defective.
	column are not necessary to
		(220–230–240V AC)
	perform.								* Line filter (L01) is defective.
		4. Between + and – of C02
									* Resistor (R01) is defective.
		(310 ~ 340V DC)
									* Diode (DB01) is defective.
		5. Between		35V	and		GND
									5. IC01, IC02, T01 are defective.
		6. Between		12V	and		GND
									6. IC01, IC02, T01, F03 are defective.
		7. Between		5 V	and		GND
									7. IC01, IC02, T01, F02, Q29, IC03
									are defective.
3	Make the operation status by	Voltage check							1. Breaking wire of the relay coil,
	pushing once the START/STOP	1. Voltage of relay coil. (DC 12V)							defective relay driver. (IC31)
	button, except the status of [ON	Between pin 10 of IC31 and							2. Poor contact of relay.
								GND
	TIMER].
		Between pin 11 of IC31 and						GND
		2. Between No. 1 and 2 of connecting
		cable terminal block.
		(220–230–240V AC)
4	Start the operation with the system	1. All indicators light for 3 sec.								Defective indicator, or poor
	which the time of the restart delay	2. Indicators do not indicate normally							
										housing assembly. (CN13)
	timer is shortened.	after approximate 3 sec.							
5	Make the operation status by pressing	1. Compressor does not operate.							1. The temperature of the indoor heat
	once the START/STOP button.	2. OPERATION lamp flashes.							exchanger is abnormally low.
	1. The time of the restart delay timer								2. Poor contact of the heat exchanger
	is shortened.								sensor. (The connector is
	2. Cool operation								disconnected.) (CN01)
	3. Air volume [AUTO]								3. Heat exchanger sensor, main P.C.
	4. Make the setting temperature lower								board are defective.
									4. Main P.C. board is defective.
	enough than room temperature.
	5. Continuous operation.
6	Turn the power on after connecting	1. The voltage of DC 35V is not							1. Indoor fan motor is defective.
	the motor connector.	measured between the red and							(Protecting operation on the P.C.
	Start the operation with the following	black of the motor terminals.							board.)
	condition.	2. Motor does not rotate.							2. Poor contact of the motor
	1. Operation [Cooling]	(The key operation is accepted.)							connector.
	2. Airflow [High fan]	3. The motor rotates, but it vibrates too							3. P.C. board is defective.
	3. Continuous operation	much.

– 54 –